Plow bottom



Feb 519, 1946. v c. e. STRANYDLUND 7 2,395,021.

' PLOW BOTTOM Filed Ap ril 8, 1943 a g 2o 'INVENTOR. CARL e. STRANDLUND' A TORNEYS Patented Feb. 19, 1946 PLOW BOTTOM,

Carl G. Strandlund, Moline, Ill., assignor to Deere & Company; Moline, 111., a corporation of Illinois Application April 8, 1943, Serial No. 482,340

I 14 Claims. The present invention relates generally to agricultural implements and more particularly to moldboard plows.

The object and general nature ofthe present invention is theprovision of'a plow bottom in which a single renewable and adjustablemember forms both the point and the landside, the forward portion of the combined point and landside being disposed at the landward edge of the share blade which is also removableand replaceable I and which consists of a'simple inexpensive piece which can be formed by rolling without any expensive forging operations. e

More specifically, itis a, feature of this'invention toprovide a plow having a landside baror point disposed substantially entirely to the landward side of the plane of vthe frog and the landward edges of the moldboard and share blade. Further, it is a feature of this invention to provide means for adjusting the position of the bar,

the adjusting means being so arranged that as the bar is shifted forwardly to compensate for wear at the front or earth-penetrating end, the forward portion is also loweredso as to compensate for wear on the lower face of the front end of the bar. 7 V I I .1 Another feature of this invention is the provision of a bar point disposed entirely to oneside of i the plane of thefrog and the landward edges of I the moldboard and share blade, in connection with a coulter disposed substantially in the landward plane of the bar point, with an open space between the coulter and the edge of the moldboard through which a portion of the furrow slice may be directed substantially directly rearwardly for deposit in the landward corner of the furrow opened by the plow bottom, the landward edge of the moldboard and thecoult'er forming cutting edges that are spaced apart laterally to provide therebetween the above-mentioned open space. Further, it is a feature of this invention to provide alandwardly disposed bar point in connection with a coulter that is disposed so that its lower edge substantially aligns with the upper edge of the forward portion of the ban-thereby providing for a clean severance of the furrow slice from the land; v I f v v A further feature of this invention is the provision of a combined point and landside in which the forward end of the combined point and landside is widened whereby a portion thereof is disposed in front of the forward end of the share blade and protects the latter.

These and other objects and advantages of the present invention will be apparent to those skilled tion have been incorporated;

in the art after a consideration of the following detailed description, taken in conjunction with the accompanying drawing, in which:

Figure 1 is a perspective view of a moldboard plow in which the principles of the present inven- Figure 2 is a fragmentary view of the frog, showing the arrangement of the holes therein to provide for forward adjustment of the combined point and landside member; I

Figure 3 is a front view of the plow bottom shown in Figure 1';

e 1 Figure 4 is a bottom view, showingparticularly .the relation between the point member, the; frog vand the share blade;

Figure 5 is a fragmentary perspective view of a modified form of the present invention in which the landside bar extends generally upwardly and rearwardly;

Figure 6 is a front view of the plow bottom of Figure 7 is a top view of the and landside bar; and a l Figure 8 is a section taken along a line8-8 of Figure 7. a

Referring now to the drawing, the plow in which the principles of the present invention .have been incorporated includes a plow beam I having a rear downwardly curvedend 2 to which a plow bottom or furrow opener, indicated in its entirety by the reference numeral 4, is secured, as by a pair ofbolts 5. a

combined point The plow bottom 4 is of particular construction.. The bolts 5 pass through openings 6 in a frog 1 (see Figure 4) the frog 7 including a landward section 8 and a furrowward section 9. The landward section 8 is disposed in a substantially vertical longitudinally extending plane. The moldboard of the plow bottom is indicated by the reference numeral II and is bolted to the landward section 9 of the frog 1. Below the moldboard I l is a share blade l2 which is bolted, as at v I3 (Figure 4), to the section 9 of the frog 1; As best indicated in Figures 1 and 3, the edge [5 of the moldboard and the edge, l6 of the share blade I 2 are disposed in a common vertical plane that substantially coincides with the plane of the landward section 8 of the frog 1. The moldboard may be reenforced by a brace l1 extending from the frog 1 to the wing of the moldboard.

The combined point and landslide member is indicated in its entirety by the reference numeral 20 and, asbest shown in Figures 4 and 7, comprises a bar of substantially rectangular cross section for the major portion of its length, the

forward end 21 of the bar being sharpened and widened as at 22, with an extension 23 disposed furrowwardly and lying substantially directly in front of the forwardmost point 24 (Figure 4) of the share blade I2. Also, the bar 20 adjacent its forward end is curved downwardly, as at 25, so as to provide the proper amount of suck to aid in securing the necessary penetration. Also, the landward point 21 (Figure 7) of the forward sharpened end 22 is extended landwardly to aid in penetrating the soil. At the front end of the bar 20 the upper face 28 (Figures 3 and '7) is beveled furrowwardly so as to conform approximately to the angle and inclination of the adjacent portions of the share blade l2, 7

In the form of the invention shown in Figures 1-4, the bar 29 is bolted to the lower edge of the landside section of the frog 1- so asto lie in substantially horizontal position, with the upper flat face 3 l (Figure 1) of the bar 20 appreciably below themoldboa-rd l-l-. From the construction as described so far it will be clear A that the forward end 'of the-bar- Zfl serves asthepointof the plow taking thebrunt of the work of penetrating the soil, while the rear portion of the-bar 26 runs 4 7 along the bottom and-landward side ofthe furrow, serving thereby as a landside and heel.

To provide for-adjustingthebar 2E) forwardly, the landward section d of the frog I is formed with two sets of openings-35 and 36 (Figure 2).

Also, the-bar-2il is apertured to receive-bolts 31 and 38 The holes 35 in thefrog-L aredisposed substantiallydn a horizontal linewhile the forwardholes 36 are disposed in a downwardly and forwardly extending line that may, if desired,v

be curved The-purposeof thisparticular arrangement is-th-is. The front end of the bar 29 isthe-part-that obviouslyreceives the: most wear, the wear occurring on both the upper. andllower faces thereof. When the cutting edge at the. front end of the bar 20 wears back asubstantial; extent, it is preferable to shift thev bar 26 forwardly after sharpening the same. so as to bringthe renewedpoint substantially to-the same or original position. In order to do this it:-is.usu ally most convenientto-lowerthefront end of the bar-2D:- a relatively slight amount,. and by disposing the holes:3-6 in=adownwardly curved'line, whenever the bar Zliisadiusted to a new forward position the bolt 38; which passes through the o'peni'ngtt, in being placed in a-more forward opening is, at the same time, lowered relative to thef-rog. 'Ihowear on the lower side of the .rear por-tionofthe bar 20 is not as greatv as at the front end, and for that reason the holes 35;; may

be arranged ina, horizontalline. However, if

desired, the openings 35: mayalso be disposed on a downwardly extending line if necessary.

Secured to the plow beam l is a-coulter 4070f moreor less conventional construction, embody inga rotatable disk M, mounted in a; coulter bracket-42 which at its forward portion is connected to= the coulter shank 43-; The shank is secured to'the plow beam l by means of a clamping-member 44. Thecoulten disk M rotates upon suitable-bearings heldinplace by:-a bolt 45 As best shown-inFig-ure-Ii-the plane of the disk 41 is spaced landwardly- 0f the longitudinal verticalplane in which the moldboard and share edges Iii-and l6" and thelandward face 8 of the frog! are-disposed. Thecoulter disk 41 and the edges l5 and IE define cutting edges at the bottom of which isthe pointsmember 28. These cutting edges serve to sever alandward sectionfrom the furrow slice, said section passing directly rearwardly over the upper flat face 3| of the bar 29 whence it dropsinto the landward corner of the furrow while the major and remaining portion of the furrow slice is turned by the moldboard I l in the usual manner. The advantage of directing a portion from the landward edge of the furrow slice directly rearwardly is that better coverage, of. trash and the like is secured. The lower edge of the coulter 4| is disposed in longitudinal alignment with the outer or landward edge of the upper face at the front end of the bar 20, as shown by the dotted line in Figure 1.

A modified form of the invention is shown in Eigures 5 and- 6. In this form of the invention the frog, moldboard and share blade are of substantially the same construction as described above; and.- hence the same reference numerals have; been employed. In this form of the invention a combined point and landside, indicated in its entirety-by thereferencenurneral E36; is fastened' to the' -landward section 3: of the mol'dboard I by attaching bolts 5|, the member 5W being disposed in alforwardl yand downwardly extending position as best-shown in,Figure- 5'. Thebar 5fl= is of substantially the same form as the bar 20 describedabove: except that the front endis shaped slightly differently, having abevel 52".011 its lower side, As best shown. in- Figure, 6; the furrowward forward point 5310f thebar. 5f] iszdi'sposed substantially directly in: front of. the forwardmost point of'theflshare blade: l2, the. point 53 being substantially" the same asthe. point: 23 described above; Preferably the holes. (not shown) in the landward section: 8. of thefrog 1 that receive the bolts-511 are disposedin a straight line; the angleof thebar Eff-being chosensothat when the-ban 50 is .shiftediforwardly; to: compensate for wear, the forward' point comes into the desired position without: having the front Iset-of holes, such-asthe holesffi in FigureZ, arranged in a. downwardly extending liner Like the barZ iI,

th bar 50* is I connected with the" lower portion of the landward-section 8 of thefrog-l, but, as shown in Figurefi; sincethe barfiflextendsupwardly and rearwardly it is desirable-to provide a heel plate 56- fastened to the frog T just below thebaf-BO: If desired, the latter may rest on the forward-edgeof theplate-BG; and-,- taken together, the-members; 50') and 5'6f'orm the'landside of the plow bottom; 'As showninFigure 6, the coulter il; is disposed substantially in the plane oftthe landward face off thebar 50'; thus being similar to the arrangement" shown in Figure 3"and-described above, Thecoulterll'forms one cuttin edge, and the edges, l 5 and 1.67 of 1 the moldboard andshare form ,an adjacentcutting edgev spaced omithe, first. cutting. e e, these. ut ed serving to sever aportionlof the furrow slice. from the. landward side, thereof, andv the point, 513;. at the" lower portions ,of these, cutting. edges, serves to direct. the severedfurrowi slice, portiondirectly rearwardly withoutlpassing over", the moldboard, with the advantages mentioned above'iniconnectionv with Figures: If. desired, the: bar. 50 may be provided with a plurality of1openings; as indicated; at; 61; (Figure; 5.) instead of providing a; plurality of openings in the-frog-ll While; I'yhave; shown; and: described 1 above: the preferred structure in the principles of the present invention havenbeen inccrporated jt is to be understoodithata myrinventionzis otato be limitedito:themarticular,sdetailmshowncanddescribed above, butsthatg. inafact; widely different raaeaoai for supporting said" moldboard and share blade with their landward edges disposed substanmeans may be employed'in the practice of the 1. A plow bottom comprising a frog having a planar landward portion, a moldboard and a share blade fixed to said frog and extending generally furrowwardly from the landward portion of said frog, said moldboard and share-blade having landside edges disposed substantially in the plane of the landward portionof said frog,

and a generally longitudinally extending bar forming a combined point and landside fixed to said landward portion of said frog and disposed substantially entirely landwardly of said p-lane,

2. A'plow bottom as defined in claim 1, further characterized by the forward portion of said tially the same vertical plane, a plow point having a landward face and fixed to said supporting means in a position substantially underneath said landward edges and lying substantially landwardly of saidvertical plane of said landward edges, and a coulter disposed substantially in front; of

. and above said plow point and disposed substancombined point and landside being disposed against the landward edge of said share blade and formed with a widened forward end, a portion of which is disposed in front of and serving to protect the forwardmost portion of said sh'are blade.

3. The invention set forth in claim 1, further characterized by said bar having an upper face and a landward face, a coulter disposed in a position spaced landwardly from said plane and substantially in the plane of the landward face of said bar, said coulter having a lower edge disposed in approximate alignment with the upper face of said bar.

' 4. The invention set forth in claim 1, further characterized by said bar having an upper face and a landward face, a coulter disposed in a position spaced landwardly from said plane and substantially in the plane of the landward face of said bar, said coulter having a lower edge disposed in approximate alignment with the upper face of said bar, said bar being disposed generally horizontally along the lower edge of said frog and adjustable generally forwardly to compensate for wear.

5. The invention set forth in claim 1, further characterized by said bar having an upper face and a landward face, a coulter disposed in a position spaced landwardly from said plane and substantially in the plane of the landward face of said bar, said coulter having a lower edge disposed in approximate alignment with the upper face of said bar, said bar being disposed along the lower portion of said frog in a generally forwardly and downwardly extending direction, said bar being adjustable generally downwardly and forwardly to compensate for wear.

6. A plow bottom having a moldboard, a share blade, a first landside member, and a second landside member disposed in a rearwardly and upwardly extending position substantially over said first landside member and substantially en'- tirely to the landward side of the landward edge of said moldboard and blade,'said second member being disposed at its rear end below the upper portion of said moldboard and having a fiat upper face adapted to carry a portion of the soil substantially directly rearwardly for deposit into the landward corner of the furrow opened by the plow bottom.

7. An agricultural implement including a plow bottom as set forth in claim 6, further characterized by a coulter disposed substantially in the plane of the landward face of said second memher, said coulter serving to sever said portion of the soil from the land.

8. In a plow, the combination of a moldboard and share blade having landward edges, means tially in the plane: of; the landward face of said plow point and-spaced landwardly of the vertical plane of the landward edges of said 'moldboard andshare blade. 1 g

9. In a plow, a frog member, a generally horizontal fore and aftextending andforwardly adjustable combined point and landsidemember, one of said members having two sets of transverse openings and the other member carrying "transverse bolt means adapted to be inserted into selected openings, the openings of the rear set being substantially horizontally arranged in fore and aft extending line, generally parallel with said combined point and landside member While the openings of'the forward set are disposed in a generally forwardly and downwardly extending line, whereby as said combined point and landside member is adjusted forwardly the forward portion of said combined point and landside member is lowered.

10. In an agricultural implement, a furrow opener adapted to sever a furrow slice from the land, said furrow opener having a moldboard and means providing a pair of generally vertically extending laterally spaced cutting edges generally at the landward side of the wallboard with an open" space between said edges, whereby a portion of the furrow slice at the landward side thereof is removed from the main body of the furrow slice, and a plow point carried by the furrow opener in a position substantially between the lower portions of said cutting edges whereby said furrow slice portion is directed substantially directly rearwardly without passing over the moldboard.

11. In a plow, a beam, a frog fixed to said beam on the landward side of the latter, a moldboard and share blade having landward edges disposed in substantially the same plane disposed at the landward side of said frog, a plow point disposed against the landward side of said frog and disposed substantially landwardly of said plane, and a coulter disposed substantially in the plane of the landward face'of said plow point, there being an open space above said plow point between the landward side of said frog and the plane of said coulter and on the landward side of said beam.

12. In a plow, the combination of a moldboard and share blade having glandward edges, means i for supporting said moldboard and share blade with their landward edges disposed in substantially the same vertical plane, a plow point having a landward face and fixed to said supporting means in a position substantially underneath said landward edges and lying substantially landwardly of said vertical plane of said landward edges, and a coulter disposed substantially in front of and above said plow point and disposed substantially in the plane of the landward face of said plow point and spaced landwardly of the vertical plane of the landward edge of said moldboard and share blade.

13. In a plow, a frog member, a generally fore and aft extending and forwardly adjustable combined point and landside member, one of said 4v members havifig two sets of transverse bpehins, oiie' set being disposed in front of the other set, and the other member carrying transverse bolt means adapted to be inserted into selected openings, the opemii gs of the rear set being siilstantially horizontally arranged in a fore and aft extend-mg use generally parallel With Said 60mbined point and landside member While the openings of the forward set are disposedin a generally forward-1y and downwardly extending line, v'vhreli'y as said combined point and Iand'side member is adjusted forwardly the forward portion of said combined point and Ia'hdside memher is lowered.

14; In a plow, a support, a, generally longitudimany extending bar forming an elongated point and landside member adjustably mounted on said support, and interconnecting means between said Support and said member and including a first set of interengageable parts on said support and the forward portion of said member and disposed in a, generally forwardly and downwardly extending line for positioning the front end of said member progressively downwardly as the member is shifted forwardly, and a second set of interengaging parts on said support and the rear portion of-said member and disposed in a generally horizontally extending line for positioning the rear end of said member progressively horizontally as the point member is shifted for- 5 wardly.

CARL G. STRANDLUNl). 

